82 
ORTHOPTERA. 
rella two, one also from India. The student should consult Hancock 
(Genera Inseetorum) for the genera, Brunner and Bolivar for most of 
the species. 
Eumastacince.— The species of this sub-family are not found com¬ 
monly in the plains and are confined to the moister forest areas. Burr 
lists 23 Indian species (Genera Inseetorum) including the aberrant 
Chometypus fenestratus, Serv. 
Tryxalince. —The genus Tryxalis (Acrida ) includes a small number 
of very variably coloured insects, distinguished by their slender form, 
produced head and flattened antennae. One species (fig. 23) is common 
Fig. 23— Tryxalis turrit a. 
(F. M. H.) 
throughout the plains, formerly known as Tryxalis turrita, L. ; there is 
confusion in the present nomenclature and it is also referred to as Acrida 
turrita , L. and as A. exaltata , Wlk. This species varies in colour from 
green to “dry grass’ 5 colour, some with bright markings, others without; 
the males are smaller (36-46 rn.rm) than the females (52-64 m.m.). Tryx¬ 
alis lugubris , Burr is a second large species separated by Mr. Burr in 
his revision of the genus (Trans. Ent. Soc. London, 1902, p. 149). T. 
brevicollis , Bob and T. variabilis f Klug. are also Indian. Acridella is 
represented by A. indica , Bob and Gelastorrhmus by two species from 
Burmah and Sikkim, respectively. 
